1996 Jeep Cherokee

That is the vacuum reservoir. It keeps things like the heater or cruise controls working when you floor it and lose manifold vacuum.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 'New' frame in the works for '08. Some Canadian Bush Trip and Build Photos:

while your bumper is off, follow the tubes that are attached to the bulb....these are a hard plastic and will become brittle thru the years....especially where they run behind the battery.....replace if needed....